The present invention relates to a method of preparing a composition for
wound healing, and for repairing and regenerating human and animal tissue, said method comprising the following steps: a. providing a
plasmid DNA in substantially pure form, which encodes a
gene that has a positive effect on the progression of the regeneration of the tissue, b. providing a component / components of a self-hardening bio-
polymer, and c. providing a
cell suspension with cells which promote regeneration, characterized in that components (a), (b) and (c) are incubated with each other simultaneously or successively so that the
plasmid and the
cell suspension are obtained homogenously distributed in one of the
biopolymer components. Furthermore,
transfection systems containing a
plasmid DNA, a component of a self-hardening
biopolymer and a
cell suspension with cells promoting regeneration are disclosed. This
transfection system does not contain any further
transfection-promoting or transfection-mediating substances. Moreover, therapeutical kits, pharmaceutical compositions and their use for the treatment of tissue defects, in particular burn wounds, and for
wound healing in the
skin are described. In particular, the present invention relates to a transfection
system containing a
plasmid DNA, a component of the
fibrin adhesive and a cell suspension.